Westport Innovations (NASDAQ: WPRT) shares slipped 28.17% to $7.55 after the company offered technology, investment, market and sales update. The company lowered its full-year revenue forecast.

Spherix (NASDAQ: SPEX) shares declined 27.50% to $1.13 after the company announced that Markman hearing date for VTech and Uniden litigation is now set for Nov 10, 2014.

Automatic Data Processing (NASDAQ: ADP) shares dropped 12.70% to $72.53 after the company closed the spinoff of CDK Global.

American Science & Engineering (NASDAQ: ASEI) fell 10.91% to $49.34 after the company announced its plans to lower its workforce by around 10% to reduce operating expenses. The company also expected to post a net loss for the second quarter.

Real Goods Solar (NASDAQ: RGSE) fell 10.30% to $1.54 after the company announced a strategy to exit large commercial business.